R-407c

[Rabindra]

If Refrigerant R 407c contained in a cylinder is tested wit a machine designed to detect R-12, R-22 and R-134a, does the machine show some traces of R-12 (about 10%)? If it does, is it because of the constitutients in R-407 c "confuse" the machine?. Any feedback is highly welcome.

[The Viking]

What machine would be used?

Normally we wouldn't use any machines that can differentiate between the different refrigerants.